Perhaps because I have children at home and only one grown child, my understanding of what the OP wrote is that the particular program that he is attending is a weak and poorly-run program, not a comment on his ability to get along with children different from himself. I didn’t see that in his commentary.
There are many, many poorly run summer programs available to children and high school students. The quality ones are few and far between, unfortunately.
ETA: The fact that the OP hasn’t returned is probably a good sign. A lot of quality programs take a day or an acclimation period to get off the ground. If that’s all it is, then good for all of the above!